Compressive and thermal characterization of syntactic foams containing hollow silicon carbide particles with porous shell

Matthew Labella, Vasanth Chakravarthy Shunmugasamy, Oliver M. Strbik, Nikhil Gupta

Research output: Contribution to journalArticle

Abstract

Silicon carbide hollow particle (SiCHS) reinforced vinyl ester matrix syntactic foams are prepared and characterized for compressive properties and coefficient of thermal expansion (CTE). Two types of SiCHS were utilized in 60 vol % to prepare syntactic foams. These SiCHS had ratio of inner to outer radius of 0.91 and 0.84 for the thin and thick walled particles. The specific compressive strength values were 33.4 and 38.8 kPa/kg/m3 and the specific compressive modulus values were 0.8 MPa/kg/m3 and 0.6 MPa/kg/m3 for the thin and thick walled SiCHS-filled syntactic foams, respectively. The shell of the hollow particles contained microporous voids, and the porosity was estimated as 16.6% and 24.8% in the walls of the thin and thick walled particles, respectively. The shell porosity adversely affected the specific compressive strength and the modulus of the syntactic foam. However, the SiCHS-filled syntactic foams exhibited low CTE values (26.7 and 15.9 × 10-6/°C). These CTE values were 65.1% and 79.3% lower than the CTE of the neat resin. Such properties can be useful for applications where syntactic foams are exposed to high temperatures and dimensional stability is important. A theoretical model is used to estimate the porosity level in the SiC shells and estimate the effective mechanical properties of the porous SiC material that forms the particle shell. Such analysis can help in using the models as predictive tools to estimate the mechanical properties of syntactic foams. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40689.

Original languageEnglish (US)
Pages (from-to)8593-8597
Number of pages5
JournalJournal of Applied Polymer Science
Volume131
Issue number17
DOIs
StatePublished - Aug 5 2014

Fingerprint

Syntactics
Silicon carbide
Foams
Thermal expansion
Porosity
Compressive strength
Mechanical properties
Dimensional stability
Hot Temperature
silicon carbide
Porous materials
Esters
Resins

Keywords

  • composites
  • foams
  • porous materials

ASJC Scopus subject areas

  • Polymers and Plastics
  • Surfaces, Coatings and Films
  • Chemistry(all)
  • Materials Chemistry

Cite this

Compressive and thermal characterization of syntactic foams containing hollow silicon carbide particles with porous shell. / Labella, Matthew; Shunmugasamy, Vasanth Chakravarthy; Strbik, Oliver M.; Gupta, Nikhil.

In: Journal of Applied Polymer Science, Vol. 131, No. 17, 05.08.2014, p. 8593-8597.

Research output: Contribution to journalArticle

Labella, Matthew ; Shunmugasamy, Vasanth Chakravarthy ; Strbik, Oliver M. ; Gupta, Nikhil. / Compressive and thermal characterization of syntactic foams containing hollow silicon carbide particles with porous shell. In: Journal of Applied Polymer Science. 2014 ; Vol. 131, No. 17. pp. 8593-8597.
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abstract = "Silicon carbide hollow particle (SiCHS) reinforced vinyl ester matrix syntactic foams are prepared and characterized for compressive properties and coefficient of thermal expansion (CTE). Two types of SiCHS were utilized in 60 vol {\%} to prepare syntactic foams. These SiCHS had ratio of inner to outer radius of 0.91 and 0.84 for the thin and thick walled particles. The specific compressive strength values were 33.4 and 38.8 kPa/kg/m3 and the specific compressive modulus values were 0.8 MPa/kg/m3 and 0.6 MPa/kg/m3 for the thin and thick walled SiCHS-filled syntactic foams, respectively. The shell of the hollow particles contained microporous voids, and the porosity was estimated as 16.6{\%} and 24.8{\%} in the walls of the thin and thick walled particles, respectively. The shell porosity adversely affected the specific compressive strength and the modulus of the syntactic foam. However, the SiCHS-filled syntactic foams exhibited low CTE values (26.7 and 15.9 × 10-6/°C). These CTE values were 65.1{\%} and 79.3{\%} lower than the CTE of the neat resin. Such properties can be useful for applications where syntactic foams are exposed to high temperatures and dimensional stability is important. A theoretical model is used to estimate the porosity level in the SiC shells and estimate the effective mechanical properties of the porous SiC material that forms the particle shell. Such analysis can help in using the models as predictive tools to estimate the mechanical properties of syntactic foams. {\circledC} 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40689.",
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AB - Silicon carbide hollow particle (SiCHS) reinforced vinyl ester matrix syntactic foams are prepared and characterized for compressive properties and coefficient of thermal expansion (CTE). Two types of SiCHS were utilized in 60 vol % to prepare syntactic foams. These SiCHS had ratio of inner to outer radius of 0.91 and 0.84 for the thin and thick walled particles. The specific compressive strength values were 33.4 and 38.8 kPa/kg/m3 and the specific compressive modulus values were 0.8 MPa/kg/m3 and 0.6 MPa/kg/m3 for the thin and thick walled SiCHS-filled syntactic foams, respectively. The shell of the hollow particles contained microporous voids, and the porosity was estimated as 16.6% and 24.8% in the walls of the thin and thick walled particles, respectively. The shell porosity adversely affected the specific compressive strength and the modulus of the syntactic foam. However, the SiCHS-filled syntactic foams exhibited low CTE values (26.7 and 15.9 × 10-6/°C). These CTE values were 65.1% and 79.3% lower than the CTE of the neat resin. Such properties can be useful for applications where syntactic foams are exposed to high temperatures and dimensional stability is important. A theoretical model is used to estimate the porosity level in the SiC shells and estimate the effective mechanical properties of the porous SiC material that forms the particle shell. Such analysis can help in using the models as predictive tools to estimate the mechanical properties of syntactic foams. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40689.

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